Vibrating propeller for boats



2 Sheets-Sheet 1.

(No Model.)

D. B. ROWLAND.

VIBRATING PROPELLHB. FOR BOATS.

Patented Oct. 16. 1888.

WITNESSES: lllll/E/VTOH,

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Walhmg mLDO- 2 Sheets-Sheet 2.

(No Model.)

D. B. ROWLAND.

VIBRATING PROPELLER FOR BOATS.

N0. 391,196. Patented Oct. 16, 1888.

m% N WM W 1,. M N 08 U MN} N hm! w w k .\N m m M\ 8 l m m E w g m W w A TTORIVEY- lUNrrsn TATES DANIEL BOONE ROWLAND, OF MOUNT SHASTA, CALIFORNIA.

VlBRATING PROPELLER FOR BOATS.

SPECIFICATION forming part of Letters Patent No. 391,196, dated October 16, 1888.

Application filed May 8, 1888. Serial No. 273,176.

To aZZ whom it may concern.-

Be it known thatl, DANIEL Booms ROWLAND, of Mount Shasta,in the county of Siskiyou and State of California, have invented a new and Improved Boat-Propeller, of which the following is a full, clear, and exact description.

This invention relates to a device for propelling boats, and has for its object to provide a device which can be operated by hand,steam, or other power,whieh will work easily and effectively, and by means of which great power can be obtained when it is operated by hand.

In the construction of this invention propelling-blades are pivoted to a bar which is mova ble in the direction of its length by power ap plied thereto, the blades closing against the bar in one direction of its movement by the action of the water against the blades and being held in extended position by the resistance of the water in the opposite direction. By means of this device the extended blades serve to propel a boat when the bar is moved outward therefrom, and by adjusting the propeller-b1ades so as to be held in extended position and fold in the opposite direction from thatin propelling the boat the blades will serve to back the boat when the bar is moved inward.

Theinvention will be set forth in the following description, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a perspective view of the invention in position to be operated by hand. Fig. 2 is a side view of the device with parts adjusted in position for backing a boat. Fig. 3 is a plan view thereof, and Fig. 4 is a detail view of the propeller-blades.

In carrying out this invention I employ a bar, 1, formed with an operating-handle,2, and having adjacent to its outer end propellerblades 3, pivoted in the oblong slot4 by means of pins 5.

Mounted in retainingstraps 6 on bar 1 is a movable bar, 7, formed at its outer end with sleeves 8, connected by bars 9, and having lateral lugs 10, against which the blades 3 abut when in adjusted extended position. The in ward movement of bar 7 on bar 1 is limited by a stop, 11, on thelatter, against which the end of the former abuts, and the outward move- (Xo model.)

ment of bar 7 is limited by a stop, 12, thereon, which abuts against the outer strap, 6. The bar 7 is moved on bar 1 by means of a handie, 13, having pivoted thereto an arm, l4,with a pin, 15,which projects through holes 16 and 17 in bars 7 and 1, respectively, and locks the bars together when in the position shown in Fig. 1.

\Vhen the bars are in the position shown in Fig. 3, they are locked by the pin 15 projecting through holes 16 and 18 in bars 7 and 1, respectively. The pin 15 is raised out ot' engagement with the hole beneath hole 16 by means of a vertical arm, 19, on arm 14, and is held in engagement Withthe holes by means of a spring, 20, located between arm 19 and bandle 13.

By the movements of the bar 7 one or the other of the sleeves 8 is brought to a posit-ion adjacent to the pivotal point of the blades 3, and its lugs 10 serve as braces or stops in one direction of movement of bar 7 for the extended blades.

The operation of the device is as follows: The bar 7 having been moved on bar 1 to bring the inner sleeve, 8, adjacent to the pivotal point of blades 3, and the bars 7 and 1 locked in that position by pins engaging holes 16 and 17, the bar 1 is mounted in a rowlock, 21, in the stern 22 of a b0at,and is pushed outward from the stern of the boat, causing the extended blades 3 on the submerged end of barl to press against the water,and by the strong resistance occasioned thereby to propel the boat. Upon drawing the bar 1 back the action ofthe water against the blades 3 causes them to be folded up against the lugs 10'ofrear sleeve 8, as shown in dotted lines, and thereby offer no resistance. This operation is repeated, and by means of the power of propulsion obtained by the folding blades results in obtaining a speed not available by any other manual device. To back the boat, the pin 15 is Withdrawn from hole 17 and the bar 7 moved back on bar 1 until the holes 16 and 18 register, when the pin 15 is automatically thrown into engagement therewith by spring 20 looking bars 7 and 1 together in the position shown in Fig. 3. In this position the outer sleeve 8 is brought adjacent to the pivotal point of the blades 3,so that when the latter are extended they will bear against and be held by the lugs 10 of outer sleeve 8 on account of the pressure of the water as the bar 1 is drawn inward toward the boat.

The operation of the device with this ad- 5 justment of parts is the reverse of that already described for propelling the boat. Whenthe bar 1 is drawn in,the pressure of the blades 3, held by thelugs 10 of outer sleeve 8 against the water, causes the boat to be drawn backward, and as it moves out from the boat the pressure of the water against the opposite side of the propeller-blades causes them to be folded up, as shown in dotted lines, and to offer no resistance in returning bar 1 to operative position.

In lieu of operating the bar 1 by hand, it may be connected with suitable driving mechanism and worked by steam or other power to propel large boats and vessels. In such case the size and strength of the parts would be such as to adapt it to the boat or vessel to be driven.

I do not intend to limit myself to the specific construction of parts herein set forth, as they may be varied without departing from the essential features of the invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a device for propelling boats, the combination, with the endwise-movable bar 1, provided with an elongated slot, 4, the folding blades 3, pivoted in said slot, of the sliding bar 7, mounted on bar 1 and adapted to endwise movement on said bar-,said bar 7 having sleeves 8 fitting upon the outer end of bar 1, and provided with lateral projecting lugs 10, said lugs adapted to be alternately adjusted to form stops 10 for the blades 3, substantially as and s for the purposes described.

2. In a propeller for boats, the combination, with the bar 1,adapted to endwise movement, having blades 3pivoted in its outer ends, and provided with retainingstraps 6and astop, 2, at its inner end, of the sliding bar 7, fittingin the straps 6, said bar provided at its outer end with sleeves 8, fitting the bar 1,lugs 10, formed on the sleeves 8, said lugs adapted to alternately form stops for the blades 3, the stop 12 on the bar 7, said stops 2 and 12 arranged to limit theinner and outer movements of the bar 7, and means for locking the bars 1 and 7 in the required position, substantially as described.

3. In a device for propelling boats, the com bination, with the bar 1, having an elongated slot, 4, the folding blades 3, pivoted therein, said bar provided with perforations l7 and 18, and straps 6, of the bar 7, sliding through the straps 6 upon the bar 1, and provided at its outer ends with the sleeves 8, fitting upon the end of bar 1, transverse lugs projecting laterally from said sleeves 8, adapted to alternately form stops 10 for the blades 3,the handle 13, having an extending arm,14c, mounted on said bar 7, pin 17, pivoted to the outer end of arm 14 and adapted to pass through a hole, 16, in the bar 7, and into either one of the perforations 17 18in the arm 1, and the retracting-spring'20, all arranged substantially as and for the purpose described.

DANIEL BOONE ROWLAND.

Witnesses:

WILLIAM MoCoNAUGHY, JAMES F. FARRAHER. 

